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\(w_1^2 \text{var}[r_1]\)
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\(w_1 w_2 \text{cov}[r_1,r_2]\)
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\(w_1 w_3 \text{cov}[r_1,r_3]\)
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\(w_1 w_4 \text{cov}[r_1,r_4]\)
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\(w_1 w_5 \text{cov}[r_1,r_5]\)
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\(w_2 w_1 \text{cov}[r_2,r_1]\)
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\(w_2^2 \text{var}[r_2]\)
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\(w_2 w_3 \text{cov}[r_2,r_3]\)
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\(w_2 w_4 \text{cov}[r_2,r_4]\)
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\(w_2 w_5 \text{cov}[r_2,r_5]\)
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\(w_3 w_1 \text{cov}[r_3,r_1]\)
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\(w_3 w_2 \text{cov}[r_3,r_2]\)
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\(w_3^2 \text{var}[r_3]\)
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\(w_3 w_4 \text{cov}[r_3,r_4]\)
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\(w_3 w_5 \text{cov}[r_3,r_5]\)
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\(w_4 w_1 \text{cov}[r_4,r_1]\)
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\(w_4 w_2 \text{cov}[r_4,r_2]\)
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\(w_4 w_3 \text{cov}[r_4,r_3]\)
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\(w_4^2 \text{var}[r_4]\)
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\(w_4 w_5 \text{cov}[r_4,r_5]\)
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\(w_5 w_1 \text{cov}[r_5,r_1]\)
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\(w_5 w_2 \text{cov}[r_5,r_2]\)
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\(w_5 w_3 \text{cov}[r_5,r_3]\)
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\(w_5 w_4 \text{cov}[r_5,r_4]\)
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\(w_5^2 \text{var}[r_5]\)
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